Amorphous. The shadow can move through a space as narrow as 1 inch wide without squeezing.

Shadow Stealth. While in dim light or darkness, the shadow can take the Hide action as a bonus action.

Sunlight Weakness. While in sunlight, the shadow has disadvantage on attack rolls, ability checks, and saving throws.

Actions

Strength Drain.Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 9 (2d6 + 2) necrotic damage, and the target's Strength score is reduced by 1d4. The target dies if this reduces its Strength to 0. Otherwise, the reduction lasts until the target finishes a short or long rest.

If a non-evil humanoid dies from this attack, a new shadow rises from the corpse 1d4 hours later.

my question is HOW IS THIS CHALLENGE RATING 1/2??!?!??!?!? It can kill high level players within a min 5-6 turns! And resistant to nonmagical weapons? i know it was meant to be a challenge but how and why are lvl 1-3 players going to have magical weapons?

It has +4 to hit. Very unlikely to always hit such a high level character, especially wizards who would probably have a shield spell up their sleeve. Protection from evil spells would also make them child's play to defeat.

It has +4 to hit. Very unlikely to always hit such a high level character, especially wizards who would probably have a shield spell up their sleeve. Protection from evil spells would also make them child's play to defeat.

I ran it last night against my party of level 1 characters, and I had to remove 1d6 from its damage, or it would have murdered them. Thankfully, the Wizard passed his metagaming check Arcana check to realize that they were, and magic missiled them

It is making itself, as the Host it was previously attached to has since died. So, again, you are brought back to the question: How do you burn a Shadow? A thing which literally has almost no tangible form and by nature is never seen by a Flame in the first place until released from its Host via another Shadow's forceful interaction.